Good way to null check a long list of parameters

java, methods

Solution

You can simply do

for (String s : Arrays.asList(param1, param2, param3, param4)) {
    if (s != null) {
        out.print(s);
    }
}

or

for (String s : new String[] {param1, param2, param3, param4}) {
    if (s != null) {
        out.print(s);
    }
}

Problem

Suppose I have a long set of of parameters all of the same type for some method. I have a similar operation to do on each parameter (if they are not null). Assume I have no control over the method signature since the class implements an interface. For example.. something simple like this. Set of String params.. ``` public void methodName(String param1, String param2, String param3, String param4){ //Only print parameters which are not null: if (param1 !=null) out.print(param1); if (param2 !=null) out.print(param2); if (param3 !=null) out.print(param3); if (param4 !=null) out.print(param4); } ``` Is there any way I can iterate through the list of String parameters to check if they are not null and print them without having to reference each variable separately?

Original source